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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2022-02-10 14:47:17 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2022-02-23 14:18:18 -0300
commitdbf37d6d0eccc01e6f5574a01eae64bb54a491ba (patch)
tree5abdaea6522ad316331e804dac7b31e8595031d5
parent4e81019f301fa353f3d25ae5daf9141ad1462f60 (diff)
downloadglibc-dbf37d6d0eccc01e6f5574a01eae64bb54a491ba.tar.gz
s390: Remove bzero optimizations
The symbol is not present in current POSIX specification and compiler already generates memset call.
-rw-r--r--sysdeps/s390/Makefile2
-rw-r--r--sysdeps/s390/bzero.c47
-rw-r--r--sysdeps/s390/ifunc-memset.h9
-rw-r--r--sysdeps/s390/memset-z900.S32
-rw-r--r--sysdeps/s390/multiarch/ifunc-impl-list.c15
5 files changed, 2 insertions, 103 deletions
diff --git a/sysdeps/s390/Makefile b/sysdeps/s390/Makefile
index ade8663218..5b6a96579c 100644
--- a/sysdeps/s390/Makefile
+++ b/sysdeps/s390/Makefile
@@ -66,7 +66,7 @@ endif
endif
ifeq ($(subdir),string)
-sysdep_routines += bzero memset memset-z900 \
+sysdep_routines += memset memset-z900 \
memcmp memcmp-z900 \
mempcpy memcpy memcpy-z900 \
memmove memmove-c \
diff --git a/sysdeps/s390/bzero.c b/sysdeps/s390/bzero.c
deleted file mode 100644
index 1f0a03e2ed..0000000000
--- a/sysdeps/s390/bzero.c
+++ /dev/null
@@ -1,47 +0,0 @@
-/* Multiple versions of bzero.
- Copyright (C) 2018-2022 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <https://www.gnu.org/licenses/>. */
-
-#include <ifunc-memset.h>
-#if HAVE_MEMSET_IFUNC
-# include <string.h>
-# include <ifunc-resolve.h>
-
-# if HAVE_MEMSET_Z900_G5
-extern __typeof (__bzero) BZERO_Z900_G5 attribute_hidden;
-# endif
-
-# if HAVE_MEMSET_Z10
-extern __typeof (__bzero) BZERO_Z10 attribute_hidden;
-# endif
-
-# if HAVE_MEMSET_Z196
-extern __typeof (__bzero) BZERO_Z196 attribute_hidden;
-# endif
-
-s390_libc_ifunc_expr (__bzero, __bzero,
- ({
- s390_libc_ifunc_expr_stfle_init ();
- (HAVE_MEMSET_Z196 && S390_IS_Z196 (stfle_bits))
- ? BZERO_Z196
- : (HAVE_MEMSET_Z10 && S390_IS_Z10 (stfle_bits))
- ? BZERO_Z10
- : BZERO_DEFAULT;
- })
- )
-weak_alias (__bzero, bzero)
-#endif
diff --git a/sysdeps/s390/ifunc-memset.h b/sysdeps/s390/ifunc-memset.h
index db15df9bc1..7098332e92 100644
--- a/sysdeps/s390/ifunc-memset.h
+++ b/sysdeps/s390/ifunc-memset.h
@@ -25,19 +25,16 @@
#if defined HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT
# define MEMSET_DEFAULT MEMSET_Z196
-# define BZERO_DEFAULT BZERO_Z196
# define HAVE_MEMSET_Z900_G5 0
# define HAVE_MEMSET_Z10 0
# define HAVE_MEMSET_Z196 1
#elif defined HAVE_S390_MIN_Z10_ZARCH_ASM_SUPPORT
# define MEMSET_DEFAULT MEMSET_Z10
-# define BZERO_DEFAULT BZERO_Z10
# define HAVE_MEMSET_Z900_G5 0
# define HAVE_MEMSET_Z10 1
# define HAVE_MEMSET_Z196 HAVE_MEMSET_IFUNC
#else
# define MEMSET_DEFAULT MEMSET_Z900_G5
-# define BZERO_DEFAULT BZERO_Z900_G5
# define HAVE_MEMSET_Z900_G5 1
# define HAVE_MEMSET_Z10 HAVE_MEMSET_IFUNC
# define HAVE_MEMSET_Z196 HAVE_MEMSET_IFUNC
@@ -51,24 +48,18 @@
#if HAVE_MEMSET_Z900_G5
# define MEMSET_Z900_G5 __memset_default
-# define BZERO_Z900_G5 __bzero_default
#else
# define MEMSET_Z900_G5 NULL
-# define BZERO_Z900_G5 NULL
#endif
#if HAVE_MEMSET_Z10
# define MEMSET_Z10 __memset_z10
-# define BZERO_Z10 __bzero_z10
#else
# define MEMSET_Z10 NULL
-# define BZERO_Z10 NULL
#endif
#if HAVE_MEMSET_Z196
# define MEMSET_Z196 __memset_z196
-# define BZERO_Z196 __bzero_z196
#else
# define MEMSET_Z196 NULL
-# define BZERO_Z196 NULL
#endif
diff --git a/sysdeps/s390/memset-z900.S b/sysdeps/s390/memset-z900.S
index d454743f75..7adb466bb1 100644
--- a/sysdeps/s390/memset-z900.S
+++ b/sysdeps/s390/memset-z900.S
@@ -24,11 +24,7 @@
/* INPUT PARAMETERS - MEMSET
%r2 = address of memory area
%r3 = byte to fill memory with
- %r4 = number of bytes to fill.
-
- INPUT PARAMETERS - BZERO
- %r2 = address of memory area
- %r3 = number of bytes to fill. */
+ %r4 = number of bytes to fill. */
.text
@@ -47,12 +43,6 @@
# define BRCTG brct
# endif /* ! defined __s390x__ */
-ENTRY(BZERO_Z900_G5)
- LGR %r4,%r3
- xr %r3,%r3
- j .L_Z900_G5_start
-END(BZERO_Z900_G5)
-
ENTRY(MEMSET_Z900_G5)
.L_Z900_G5_start:
#if defined __s390x__
@@ -100,14 +90,6 @@ END(MEMSET_Z900_G5)
#endif /* HAVE_MEMSET_Z900_G5 */
#if HAVE_MEMSET_Z10
-ENTRY(BZERO_Z10)
- .machine "z10"
- .machinemode "zarch_nohighgprs"
- lgr %r4,%r3
- xr %r3,%r3
- j .L_Z10_start
-END(BZERO_Z10)
-
ENTRY(MEMSET_Z10)
.L_Z10_start:
.machine "z10"
@@ -141,14 +123,6 @@ END(MEMSET_Z10)
#endif /* HAVE_MEMSET_Z10 */
#if HAVE_MEMSET_Z196
-ENTRY(BZERO_Z196)
- .machine "z196"
- .machinemode "zarch_nohighgprs"
- lgr %r4,%r3
- xr %r3,%r3
- j .L_Z196_start
-END(BZERO_Z196)
-
ENTRY(MEMSET_Z196)
.L_Z196_start:
.machine "z196"
@@ -204,10 +178,6 @@ END(__memset_mvcle)
/* If we don't use ifunc, define an alias for memset here.
Otherwise see sysdeps/s390/memset.c. */
strong_alias (MEMSET_DEFAULT, memset)
-/* Same for bzero. If ifunc is used, see
- sysdeps/s390/bzero.c. */
-strong_alias (BZERO_DEFAULT, __bzero)
-weak_alias (__bzero, bzero)
#endif
#if defined SHARED && IS_IN (libc)
diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c
index 29598c2a6e..c1902b2c26 100644
--- a/sysdeps/s390/multiarch/ifunc-impl-list.c
+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c
@@ -104,21 +104,6 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
IFUNC_IMPL_ADD (array, i, memset, 1, MEMSET_Z900_G5)
# endif
)
-
- /* Note: bzero is implemented in memset. */
- IFUNC_IMPL (i, name, bzero,
-# if HAVE_MEMSET_Z196
- IFUNC_IMPL_ADD (array, i, bzero,
- S390_IS_Z196 (stfle_bits), BZERO_Z196)
-# endif
-# if HAVE_MEMSET_Z10
- IFUNC_IMPL_ADD (array, i, bzero,
- S390_IS_Z10 (stfle_bits), BZERO_Z10)
-# endif
-# if HAVE_MEMSET_Z900_G5
- IFUNC_IMPL_ADD (array, i, bzero, 1, BZERO_Z900_G5)
-# endif
- )
#endif /* HAVE_MEMSET_IFUNC */
#if HAVE_MEMCMP_IFUNC